Speaking of WHICH, how long
have you been separated?
The Big Bang Theory Season 11, Episode 14
Which means you can afford it.
Game of Thrones Season 3, Episode 1
...without WHICH human beings
The Big Bang Theory Season 4, Episode 2
...WHICH is messy, unsanitary...
The Big Bang Theory Season 4, Episode 1
Breaking Bad Season 2, Episode 8